Wire screen



May 2, 1933. J. w. GALLOWAY WIRE SCREEN Filed March 21, 1952 Patented May 2, 1933 UNITED STATES JAMES W. GALLOWAY, OF HAMILTOLL.

PATENT OFFICE ONTARIO, CANADA, ASSIGNOR TO THE WIRE SCREEN Application filed March 21, 1932, Serial No. 600,105, and in Canada January 22, 1932.

The principal objects of this invention are to provide a screen which will retain the accuracy of its mesh under heavy duty and which will wear uniformly and will there fore have remarkably long life.

The principal feature of the invention consists in the novel manner of crimping the wires whereby the wires are rigidly locked together at every crossing and the wearing surface is free from widely spaced high points thus presenting a screen surface with a multiplicity of closely arranged contact points arranged in a common plane.

In the accompanying drawing, Figure 1 is a plan view of a portion of a screen constructed in the preferred form of this invention,

Figures 2 and 3 are sectional views taken both ways of Figure 1,

Figure 4 is a plan View of a shghtly modified form of screen embodying tlllS'lllVGlltion, and

Figures 5 and 6 are sectional views of the screen shown in Figure 4.

It is well known to those conversant with the manufacture and use of wire screens that :with screens made with the ordinary 0E1 flat crimp consisting of a series of obtuse angular bends, the wires slip at the points of intersection and spread unevenly thus dcstroying the accuracy of the mesh. Further, the apexes of the bends in the wire pro ect upwardly in sharply angled points which wear very quickly especially in the smaller meshes.

According to the present invention 'as illustrated in Figures 1, 2, and 3 the intersecting wires 1 and 2 are each formed with a series of downwardly bentdecp short arcshaped crimps 3 having an inner radius 4 conforming to the perimeter of'the radius of the cross-section 5 of the wire crossing thereover. Between the deep crimps 3 the wire is bent slightly downward at the points 6 either side of a shallow upwardly bent crimp 7, the under arc-shaped radius of which conforms to the perimeter of the cross-section 8 of the wire crossing thereunder.

The apexes 9 of the upward bends of the wire forming the deep downward crimps are approximately level with the top of the wire crossing thereover and the apexcs of,v the shallow upward crimps 7 are level with the 'apexes 9 and the tops of the wires crossmg over the deep crimps. It will thus be seen that the wires 1 present a considerable number of rounded apexes closely arranged together.

The cross wires 2 are formed exactly the same as the wires 1 and the deep crimps in these wires pass under the shallow crimps ofi' the wires 1. while the deep crimps of the short crimps and when pressure is applied the bonds of the intersecting wires conform to the diameters of the wires at the points of intersection.

The result of this construction will be readily seen in that all the tops of the crimps are rounded and the tops of the intersecting wires fill in the larger spaces made by deep crimps and a substantially smooth or level contact surface is presented over which the material to be screened passes. The wear is therefore uniformly distributed over the entire area andthere are no prominent isolated or widely spaced apexes exposed to the impact and consequently excessive wear by the material passing over them.

the y In the form shown in Figures 4, 5 and I 6, one set of wires 1 are formed the same as the wires 1 but the mesh is shorter in one direction, and the wires 2 are formed with equal fiat obtuse angled crimps 10 which pass alternately under the shallow upwardly bent crimps 7 and over the deep downwardly bent crimps 3.

It will be readily appreciated that a screen such as described will not only have considerably longer life than'the ordinar screen but it is much more rigid and it o ers less resistance to the passe e thereover of material to be screened. e result is that a much greater quantity of material can be screened in a given period of time.

What I claim as my invention is 1. A wire screen in which each set of wires is formed with spaced deep downward crimps the wires between said deep downward crimps being depressed at spaced points to a depth sufliciently only to form a relatively shallow central upward crimp on, the underside, the deep crimps of each set of wires being embraced in locking contact with the shallow crimps of each set, whereby a ruggedly interlocked structure of enhanced wear resistance is provided.

2. A wire screen in which the wires arev formed at spaced intervals with short deep crimps depressed thereinto the full depth "of the diameter of the wire, the length of wire between such deep crimps being depressed either s1de of a shallow upward crimp, 'said shallow crimps being of a depth substantially equal to half the depth of the diameter of the wire and having their bottoms disposed in a common plane with the bottoms of the deep crimps, the wires being crossed with the shallow crimp of one set of wires interlocking with and overlying the deep crimp of the intersecting set of wires.

ceive the latter, the length of wire between said abrupt downward crimps being deformed to present triple rounded apexes in substantial alignment with the top of the cross wires fitting in said respective abrupt downward crimps, the central apex having a shallow crimp compared to the aforesaid crimps to receive the cross wire, whereby rigidity of structure and extended wearing surface are combined.

5. A wire screen having -wires crimped deeply and abruptly downward at spaced points to receive cross wires and having the length of wire between said abrupt downward crimps "deformed into triple aligned apex formations with a shallow crimp underlying the central apex to receive the cross wire, the cross wires referred to havin acorrespondin'g formation and number 0 low the central of the aligned apexes,'whereby a rugged structure 0 surface is produced.

6. A w1re screen having wires crimped abextended wearing I ruptly downward to a depth substantially equal to the thickness of the cross wire to receive the latter, the length of wire between said abrupt downward crimps being deformed to present triple rounded apexes in substantial alignment with the top of the cross wires fitting in said respective abrupt downward crimps the central'apex having a shallow crimp compared to the aforesaid crimps to rece ve the cross wire, the cross wires referred to havin a corresponding formation and number 0 crimps to the first mentioned wires and the respective sets of wires being interlocked with the deep downward crimps of each embracing the shallow crimps of the other below the central of the aligned apexes whereby a rugged structure presenting the maximum wearing surface is produced.

7; A wire screen having one set of wires 'crimped. deeply and abruptly downward at spaced points, the length of wire between a.

said deep crimps being deformed to present upwardly disposed triple aligned apices having an upward crimp below the central apex formation of shallow depth compared to said deep downward crimps, and a set of 3 cross wires threaded under-and over the aforesaid set of wires and embraced on the under side by the shallow upward crimps below the central of the aligne-l apex formarelatively deep downward crimps, whereby a rugged structure of extended wearing surface is'produced.

8.- A wire screen having one set of wires -tions 'and-embraced-on the upper side by the L 9 crimped-deeply and-abruptly downward at:'

spaced' points, the length of wire between said deep crimps being deformed to present upwardly disposed triple aligned apices having an upward crimp below the central apex formation of shallow depth compared to said deep downward crimps, and a set of cross wires having upward and downward crimps of successively uniform depth embraced respectively by the deep and shallow crimps of the first-mentioned set of wires, said deep downward crimps being of a depth to accommodate the upwardly crimped portion of the uniformly crimped wire with its apex in substantial alignment vwith the aforesaid triple aligned apexes, whereby a rugged structure of maximum wearing surface is produced.

JAMES w.- G'ALLOWAY. 

